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Erschienen in:
Manifesto: Design Thinking Becomes Foundational Kapitel lesen Erstes Kapitel lesen

2016 | OriginalPaper | Buchkapitel

Preserving Access to Previous System States in the Lively Kernel

verfasst von : Lauritz Thamsen, Bastian Steinert, Robert Hirschfeld

Erschienen in: Design Thinking Research

Verlag: Springer International Publishing

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Abstract

In programming systems such as the Lively Kernel, programmers construct applications from objects. Dedicated tools make it possible to manipulate the state and behavior of objects at runtime. Programmers are encouraged to make changes directly and receive immediate feedback on their actions. However, when programmers make mistakes in such programming systems, they need to undo the effects of their actions. Programmers either have to edit objects manually or reload parts of their applications. Moreover, changes can spread across many objects. As a result, recovering previous states is often error-prone and time-consuming. This report presents an approach to object versioning for systems like the Lively Kernel. Access to previous versions of objects is preserved using version-aware references. These references can be resolved to multiple versions of objects and, thereby, allow reestablishing preserved states of the system. We present a design based on proxies and an implementation in JavaScript.

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Metadaten
Titel
Preserving Access to Previous System States in the Lively Kernel
verfasst von
Lauritz Thamsen
Bastian Steinert
Robert Hirschfeld
Copyright-Jahr
2016
Buch
Design Thinking Research

Print ISBN: 978-3-319-19640-4

Electronic ISBN: 978-3-319-19641-1

Copyright-Jahr: 2016

DOI
https://doi.org/10.1007/978-3-319-19641-1_15

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